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Supersonic Pulsed Injection (2001)

Author: Cutler, A. D.; Harding, G. C.; Diskin, G. S
Subject: INFRARED DETECTORS; DATA REDUCTION; PREDICTION ANALYSIS TECHNIQUES; SPACE TRANSPORTATION SYSTEM; WIND TUNNELS; AERODYNAMIC HEATING; BOUNDARY LAYER TRANSITION; TURBULENT BOUNDARY LAYER; HYPERSONIC BOUNDARY LAYER; X-33 REUSABLE LAUNCH VEHICLE; SPACE SHUTTLE ORBITERS; CALIBRATING; DATA ACQUISITION
Year: 2001
Language: English
Book contributor: NASA
Collection: nasa_techdocs

Description

An injector has been developed to provide high-speed high-frequency (order 10 kHz) pulsed a supersonic crossflow. The injector nozzle is formed between the fixed internal surface of the nozzle and a freely rotating three- or four-sided wheel embedded within the device. Flow-induced rotation of the wheel causes the nozzle throat to open and close at a frequency proportional to the speed of sound of the injected gas. Measurements of frequency and mass flow rate as a function of supply pressure are discussed for various injector designs. Preliminary results are presented for wall-normal injection of helium into a Mach-2 ducted airflow. The data include schlieren images in the injectant plume in a plane normal to the flow, downstream of injection.

Creative Commons license: Public Domain

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Identifier:	nasa_techdoc_20010010365
Document-source:	CASI
Documentid:	20010010365
Nasa-center:	Langley Research Center
Online-source:	http://wayback.archive-it.org/1792/20100216035828/http://hdl.handle.net/2060/20010010365
Original-nasa-rights:	Unclassified; Copyright (Distribution as joint owner in the copyright) ; Unlimited; Publicly available;
Report-number:	AIAA Paper 2001-0352
Updated-added-to-ntrs:	2009-07-29
Licenseurl:	http://creativecommons.org/licenses/publicdomain/
Mediatype:	texts
Rights:	Public Domain
Identifier-access:	http://www.archive.org/details/nasa_techdoc_20010010365
Identifier-ark:	ark:/13960/t2q53gp3x
Ppi:	300
Ocr:	ABBYY FineReader 8.0